diff --git a/README.md b/README.md
index b999390..c31aa93 100644
--- a/README.md
+++ b/README.md
@@ -210,8 +210,34 @@ class StubArtist {
 
 }
 
+class StubCustomTitle {
+    + StubCustomTitle()
+    + List<CustomTitle> GetCustomTitles()
+    + List<CustomTitle> GetCustomTitlesByUrl(List<string> urls)
+    + void AddCustomTitle(CustomTitle customTitle)
+    + void RemoveCustomTitle(CustomTitle customTitle)
+
+}
+
+class StubInfoTitle {
+    + StubInfoTitle()
+    + List<InfoTitle> GetInfoTitles()
+    + List<InfoTitle> GetInfoTitlesByUrl(List<string> urls)
+    + void AddInfoTitle(InfoTitle title)
+    + void RemoveInfoTitle(InfoTitle title)
+    + {static} void AddFeat(InfoTitle infoTitle, Artist artist)
+    + {static} void RemoveFeat(InfoTitle infoTitle, Artist artist)
 
+}
 
+class StubPlaylist {
+    + StubPlaylist()
+    + List<Playlist> GetPlaylists()
+    + Playlist? GetPlaylistByUrl(string url)
+    + void AddPlaylist(Playlist playlist)
+    + void RemovePlaylist(Playlist playlist)
+
+}
 Album --> "+ artist" Artist
 Album --> "- titles*" Title
 Playlist --> "- titles*" Title
@@ -222,6 +248,10 @@ InfoTitle --> "+ artist" Artist
 Manager --> "+ datamanager" IDataManager
 StubArtist --> "- artists*" Artist
 StubAlbum --> "- stubArtist" StubArtist
-StubAlbum --> "- albums" Album
+StubAlbum --> "- albums*" Album
+StubCustomTitle --> "- customTitles*" CustomTitle
+StubInfoTitle --> "- stubArtist" StubArtist
+StubInfoTitle --> "- infoTitles*" InfoTitle
+StubPlaylist --> "- playlists*" Playlist
 @enduml